Down syndrome is a result of errors in DNA replication during the formation of gametes or early development. While there are genetic risk factors they’re not particularly linked to inbreeding.
By far the largest risk factor is the age of the parents.
How many generations of inbreeding would be necessary before it returns again?
Down syndrome is a result of errors in DNA replication during the formation of gametes or early development. While there are genetic risk factors they’re not particularly linked to inbreeding.
By far the largest risk factor is the age of the parents.